NAD: nothing abnormal discovered: NAI: non-accidental injury: NBM: nil by mouth: NG: nasogastric (running between your nose and stomach) nocte: every night: NoF: neck of femur: NSAID: non-steroidal anti-inflammatory drug: o.d., od, OD: once a day: o/e: on examination: OT: occupational therapist: p.c. after food: p.m., pm, PM: afternoon or Nicotinamide adenine dinucleotide, or NAD, can come in two forms, as follows: NADH , "reduced" NAD, meaning it has an extra electron NAD+, "oxidized" NAD, meaning it lost an electron 62YMb.